Improper access control in Open WebUI - #VU130953
Published: May 11, 2026
Vulnerability identifier: #VU130953
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Open WebUI
Open WebUI
Software vendor:
Open WebUI
Open WebUI
Description
The vulnerability allows a remote user to modify message pin status.
The vulnerability exists due to improper access control in the pin_channel_message API endpoint when handling pin and unpin requests for standard channels. A remote user can send a crafted request to modify message pin status.
In standard channels, the endpoint checks read permission instead of write permission, allowing users with read-only access to pin or unpin messages.
Remediation
Install security update from vendor's website.